A Synergistic Effect of Surfactant and ZrO2 Underlayer on Photocurrent Enhancement and Cathodic Shift of Nanoporous Fe2O3 Photoanode.

摘要: Augmenting the donor density and nanostructure engineering are crucial points to improve solar water oxidation performance of hematite (α-Fe2O3). This work addresses sluggish reaction associated with photoanode by tweaking its internal porosity. The porous photoanodes fabricated a novel synthetic strategy via pulse reverse electrodeposition (PRED) method that involves incorporation cationic CTAB surfactant in sulfate electrolyte spin-coated ZrO2 underlayer (UL) on FTO. is found be beneficial promoting film growth rate during PRED. Incorporation Zr4+ ions from UL Sn4+ FTO into Fe2O3 lattice solid-state diffusion pertinent annihilation molecules at 800 °C produced internally films improved carrier concentration. demonstrated sustained photocurrent enhancement significant cathodic shift 130 mV relative planar under standard illumination conditions (AM 1.5G) 1 M NaOH electrolyte. absorption, electrochemical impedance spectroscopy Mott-Schottky analyses revealed not only increased light harvesting but also accelerated surface kinetics, synergistically boosting photoanodes.